Safety blasting-powder stick



May 13, 1930- H. E. ENNls v 1,758,358

SAFETY BLASTING PowQER 'sTcK I Filed-Dec. 25, 1927 M .M Z U 0M 3 lPaientel May 13,' 1930 I UNITED STATES PATENT -oI-FlcE HENRY E. ENNIS, OF THYER, WEST VIRGINIA l SAFETY BLASTING-POWDER STICK Application vfiled December 23, 1927. Serial No. 242,170.

vide a stick of blasting powder or other explosive with an opening for the reception of an inserting needle or rod, to facilitate placing of thecharge in the blasting hole.

Another important object of theeinvention is the provision of an' opening in a stick of blasting powder or other explosive located 2o adjacent to the edge ofthe stick, for the reception of an inserting needle or rod, the arrangement of the opening allowing the needle or rod to be disposed at one side ofthe blast- .ing hole to permit easy and full operation of the tamping bar without interference from the needle or rod. A- t A further object of the invention is the provision of a stick of blasting powder or other explosive formed in sections, the 'sec-v tionsf having aligned openings, all of the openings with the exceptionof the opening in the innermost sectionextending entirely through the stick with means formed on the sectionsfor inter-engagement with one an`- other whereby turning movement of the sections relative to one another will be prevented.

A further object of the invention is provision of sockets formed in the sections of a stick of blasting powder or other explosive at one side of the openings in the sections whereby the sockets can receive the inserting needle or rod when the sections are broken apart and used independently ^for small charges.

A still furtherobjectvof the invention is provision of a novel stick of blasting powder or the like, of the above character, which will be eiieient in use, one 'which will be simple and easy to manufacture and one which can be placed upon the market at' small cost and used with perfect safety.

lVith these and other objects in view, the invention consists in the novel construction, .arrangement and formation of parts, as will be hereinafter more specifically described, claimed and illustrated in the accompanying drawings, in which drawings,

Figure 1 is a longitudinal section through the improved stick of blasting powder or other explosive, showing the same inserted in a blasting hole and being tamped in place,

Figure 2 is a perspective view showing the sections of the blasting stick separated one from the other,

- Figure 3 is an end elevation of one scction of the blasting stick showing the groove formed therein,

Figure 4 -is an end elevation of another section of the blasting stick showing the tongue formed thereon for cooperation with the walls of the groove in an adjacent section of the stick.

Figure 5 is a longitudinal section through a slightly modified form of the blasting stick.

Referring to the drawings in detail, wherein similar reference-characters designate corresponding parts throughout the several views, the letter A'generally indicates the iln- A proved stick of blasting powder or other explosive and B a blasting hole in which the stick can be inserted.

In the preferred form of the invention the stick A can be formed into a plurality of sections preferably four and these sections have been indicated respectively by the reference characters 10, 11, 12 and 13. Each y of the sections is preferably wrapped independently of one another in thin oiled paperu 14 and all the sections are wrappedtogether r in heavy oiled paper 15 to form a single stick. Provision of the oiled paper 14 and 15 prcvents dampness from acting upon the stick and as the sections are independent-ly wrapped, the stick can be broken apart and the sections used independently of one another for small charges. I

The sections 10, 11 and 12 are provided with 'openings 16, 17 and 18 which extend .entirely through the sections and open outthrough the inner and louter-ends thereof., The innermost section' 13 is providedwith an opening or ,socket 19 Which extends short of the inner end thereof, but opensout through the outer end thereof. The openings 16, 17', 18 and 19 extend atjoneside of the axial centers of the sections and preferably close to the outer faces'ofthe sections for a purpose which will be later described.

'In order to prevent turning movement of 1 thesections relative to 4one another and to insure that the openings 16, 17, 18 and 19 will always be in proper alignment, the abutting ends YofV theseYV sections are provided respectively with tongues 20 and grooves 21., By referring to Figures 1 and2, it can be seen that the tongues 20 of one section will fit in the grooves 21 of the adjacent section and thus all the sections will be"interlocked one with the other. v v

In use of the improved stick of blasting powder or other explosive, an inserting needle orrod 22 is placed through the aligned opening 16, 17 18 and`19 and this needle forms a support for the stick and allowsthe insertion of the charge into the blasting hole to the furthest end thereof. Due to the fact that the openings are arranged adj acent to the sideof the stick, the needrle22 will be disposed at one sidey of the hole allowing full use of the,

tamping'bar 23, without dangerxof bending lor injuring the needle.

If preferred, the sections 10, 11 and 12 can be provided with additional sockets or open# ings 24, 251and 26 respectively, which can be Y -used when'the stick is broken apart to use only certain sections. thereof for small charges.' These openings 24, 25 and 26 do ings in. the'other sections extending entirely therethrough, and means for holding the sections against relative turning movement and the openings in longitudinal alignment.

2. A stick of explosive comprising a plurality of sections each having an inserting needle receiving opening therein, the opening in the innermost section terminating .short of theinner end thereof, and the openings in the other sections extending entirely therethrough, the facing ends of the sections havinginterlocking tongue and groove connections as and for the purpose specified.

' 3. A' stick of explosive comprising a plu-A rality of sections each having an inserting needle receivingopening therein, the opening` in' the linnermost section terminating short ofthe inner endethereof, and the o en-1 ings in the other sectionsexten'din entirely therethrough, means normally ho the sections against relative turning movement*- and the openings in longitudinal alignment,

,the lastmentioned sections also having open` ings therein terminating short of the inner 4ends thereof.

In testimony whereof I aliix my signature.

HENRY E. ENNIS.

not 'extend entirely through the sections but terminate shortof the inner ends `thereof and thus when the 'needle 22 is4 insertedin these lopenings the same will not go entirely. `through the sections, but will permit the ef- 'fective placing of each section in proper po sition. In view of thev fact that the innermost section' 13 has its opening 19 terminating shortof Vits .inner end, the necessity of providinggan additional opening or socket for this section is eliminated.

If preferred, the sticks can be made in half sections, as indicated yby the reference chari acter 30 in Figure 5 of .the drawings. In this instance, each half is wrapped in a suitable oiled paper 31 and provided with a longitudinally extending needle receiving opening 'or socket 32 which terminatesshort of the inner end of the section.

- It is to be understood from Fig. 5, that the essential. feature of the application is the needle .receiving opening 32 and thatvin most instances, the blasting stick will be made in whole length sections with the needle receiving opening 32. It is also to be under-4 stood that the whole length sections can be made in different sizes, as may be desirable. 

